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<title>HSF Opcode Definition</title>
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      <H2><FONT color=#0000a0 face="arial,helvetica,sans-serif">TKE_Visibility</FONT></H2>
      <H3><FONT color=#0000a0 face="arial,helvetica,sans-serif">Opcode</FONT><STRONG><FONT face="arial,helvetica,sans-serif">
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          <TD height=12 width=131>ASCII</TD>
          <TD height=12 width=390>V</TD></TR>
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          <TD height=12 width=131>Hexadecimal</TD>
          <TD height=12 width=390>56</TD></TR>
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          <TD height=12 width=131>Decimal</TD>
          <TD height=12 width=390>86</TD></TR></TABLE></H3>
      <P>&nbsp;</P></FONT></STRONG>
      <H3><FONT color=#0000a0 face="arial,helvetica,sans-serif">Operands </FONT></H3>
      <P><FONT face="Courier New,Courier,typewriter">
      <STRONG>Byte</STRONG>&nbsp;mask,
	  <STRONG>Byte</STRONG>&nbsp;value,<br>
      <STRONG>[Short</STRONG>&nbsp;mask_high,
      <STRONG> Short</STRONG>&nbsp;value_high<STRONG>]</STRONG>
	  </FONT></P>

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    <TD height=21 width=131>mask</TD>
    <TD height=21 width=390>bitmask of affected geometry.
							bit definitions are <a href="geometry_table.html">here</a></TD>
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    <TD height=21 width=131>value</TD>
    <TD height=21 width=390>bitmask indicating which geometry types are visible.</TD>
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	<td WIDTH="131" HEIGHT="21">mask_high</td>
	<td WIDTH="390" HEIGHT="21">if Geo_Extended (high) bit is set in the first <em>mask</em> byte,
	 this set of bits is added to <em>mask</em>.</td>
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	<td WIDTH="131" HEIGHT="21">value_high</td>
	<td WIDTH="390" HEIGHT="21">if Geo_Extended (high) bit is set in the first <em>mask</em> byte,
	 this set of bits is added to <em>value</em>.</td>
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 <P>&nbsp;</P></FONT>

<H3><FONT color=#0000a0 face="arial,helvetica,sans-serif">Notes</FONT></H3>
      <font face="arial,helvetica,sans-serif">This is the visibility which will apply to geometry in the currently opened 
      segment.  A bit in the <em>value</em> indicates that the segment has a setting for the corresponding
	  geometry type.  The matching bit in the <em>value</em> then indicates whether that geometry type is
	  visible (if set) or invisible.</font>
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